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RoomSensor 001 MCU

jirihusak·majordomus·HW/RoomSens/PCB/RoomSensor_001.1_MCU/RoomSensor_001_MCU.kicad_pcb

RoomSensor 001 MCU PCB layout, top view — open source PIC board by jirihusak
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About the RoomSensor 001 MCU PCB

RoomSensor 001 MCU is an open source PIC PCB design by jirihusak, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 58.2 × 63.9 mm, with 76 components from 36 distinct parts.

Its main chip is the PIC18F57K42, from the PIC family. Other key parts include the R-78E5-0.5, TLV70233DBVR, IX4427N, LM358 and LTV-247. By type, the board carries 31 resistors, 19 capacitors, 8 ICs, 7 diodes, 5 connectors and 1 transistor.

It belongs with the iot & wireless and sensors designs in this gallery.

From the project

Open source system for smart home

Majordomus is a modular automation system built on open standards. It fills the gap between closed, expensive commercial solutions and unreliable consumer-grade components — designed to be repairable, expandable, and to last for decades.

- 🧩 Modular hardware — base unit + interchangeable modules ( I/O, sensors) - 🔌 Standardized interface — RS-485 / ModBus HW interface, MQTT SW interface - 🔓 Vendor lock-in free — open hardware, open software, your choice - 🧠 Node-RED inside — visual programming for automation flows - 🧠 Home Assistant interface — MQTT integration for popular platform - 📡…

RoomSensor 001 MCU, from the project README
From the project README

Main components on the RoomSensor 001 MCU

PIC18F57K42R-78E5-0.5TLV70233DBVRIX4427NLM358LTV-247SN75176BDR

RoomSensor 001 MCU bill of materials (BOM)

76 components, 36 distinct parts.

QtyPartRefs
1
PIC18F57K42
U1
1
R-78E5-0.5
U2
1
TLV70233DBVR
U3
2
IX4427N
U4, U5
1
LM358
U6
1
LTV-247
U7
1
SN75176BDR
U8
1
MMBF170
Q1
1
Crystal_GND24
Y1
2
Conn_01x10
J3, J5
1
Conn_01x04
J4
1
Conn_01x06
J7
1
68611614422
J8
1
PKLCS1212E2400-R1
BZ1
1
MF-MSMF050-2
TH1
1
BSMD1812-110-33V
TH2
1
LED
D1
2
SMAJ28
D2, D7
2
MMSZ4684-E3-08
D3, D4
1
BAS70LT1G
D5
Show 16 more
QtyPartRefs
1
D_TVS_x2_AAC
D6
1
4.7 uH
L1
6
100nF
C1, C5, C6, C15, C17, C18
2
18pF
C2, C3
9
1uF
C4, C7, C9, C11, C12, C13, C14, C16 +1
2
10uF
C8, C10
7
10k
R1, R8, R11, R12, R18, R19, R20
1
100R
R2
4
4k7
R3, R4, R5, R6
6
1k
R7, R9, R10, R13, R21, R31
2
6k8
R14, R15
2
3k3
R16, R17
4
1k5
R22, R23, R24, R25
2
10R
R26, R27
1
120R
R28
2
660R
R29, R30

RoomSensor 001 MCU design files

The KiCad project lives in the jirihusak/majordomus repository on GitHub; these links point at the commit this page was built from.

RoomSensor 001 MCU: common questions

What microcontroller does the RoomSensor 001 MCU use?

The RoomSensor 001 MCU is built around the PIC18F57K42, from the PIC family.

How big is the RoomSensor 001 MCU PCB?

The RoomSensor 001 MCU measures 58.2 × 63.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RoomSensor 001 MCU?

76 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the RoomSensor 001 MCU design files?

From the jirihusak/majordomus repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the RoomSensor 001 MCU design in my own project?

Yes, under the terms of its GPL-3.0 license, which jirihusak chose for the repository.

Can I test firmware for the RoomSensor 001 MCU without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug PIC firmware against it before you order a PCB.

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